CN111424182A - Casting process for secondary aluminum - Google Patents
Casting process for secondary aluminum Download PDFInfo
- Publication number
- CN111424182A CN111424182A CN202010325726.8A CN202010325726A CN111424182A CN 111424182 A CN111424182 A CN 111424182A CN 202010325726 A CN202010325726 A CN 202010325726A CN 111424182 A CN111424182 A CN 111424182A
- Authority
- CN
- China
- Prior art keywords
- casting process
- secondary aluminum
- aluminum
- refining
- melt
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B21/00—Obtaining aluminium
- C22B21/06—Obtaining aluminium refining
- C22B21/066—Treatment of circulating aluminium, e.g. by filtration
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/05—Refining by treating with gases, e.g. gas flushing also refining by means of a material generating gas in situ
- C22B9/055—Refining by treating with gases, e.g. gas flushing also refining by means of a material generating gas in situ while the metal is circulating, e.g. combined with filtration
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
- C22C21/08—Alloys based on aluminium with magnesium as the next major constituent with silicon
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention discloses a casting process of secondary aluminum. The casting process of the secondary aluminum adopts deep-bed filtration, and the filling method of the deep-bed filtration medium is as follows: the first layer is 3/4' alumina balls with the filling height of 20mm to 30 mm; the second layer is 1/2' alumina balls with the filling height of 20mm to 30 mm; the third layer is alumina particles with 3 meshes to 6 meshes and/or 2 meshes to 4 meshes, and the filling height of the alumina particles is 350mm to 400 mm; the fourth layer is 1/2' alumina balls with the filling height of 20mm to 30 mm; the fifth layer is 3/4' alumina balls with a filling height of 20mm to 30 mm. The casting process of the regenerated aluminum can control the slag content in the regenerated aluminum melt to meet the production requirement of 3104 aluminum alloy tank body materials. In addition, in the casting process of the secondary aluminum, the control of the components of the secondary aluminum melt can be stable through the control processes of component control, temperature control, hydrogen content control, slag content control and the like, and the hydrogen content and slag content of the melt can meet the production requirements of 3104 aluminum alloy tank body materials, so that the production cost of the 3104 aluminum alloy tank body materials is reduced.
Description
Technical Field
The invention relates to the technical field of aluminum alloy casting, in particular to a casting process of secondary aluminum.
Background
3104 aluminum alloy, due to its small specific gravity, high ductility, high strength, low earing rate, is widely used in the production of can body material in food packaging field, and has a large demand amount, which accounts for about 15% of the total aluminum consumption in the world. Can bodies made from 3104 aluminum alloy, we call "3104 aluminum alloy can bodies".
In the prior art, the discarded pop cans are generally degraded to be cast aluminum alloy with lower added value.
Disclosure of Invention
In view of the above, the present invention provides a casting process of recycled aluminum, which can use recycled aluminum for 3104 aluminum alloy can body materials to reduce the production cost of 3104 aluminum alloy can body materials and ensure stable and reliable product quality.
In order to achieve the purpose, the invention provides the following technical scheme:
a casting process of regenerated aluminum adopts deep-bed filtration (namely, a deep-bed filter tank is adopted to filter a regenerated aluminum solution), and a filling method of a deep-bed filter medium comprises the following steps:
the first layer is 3/4' alumina balls with the filling height of 20mm to 30 mm;
the second layer is 1/2' alumina balls with the filling height of 20mm to 30 mm;
the third layer is alumina particles with 3 meshes to 6 meshes and/or 2 meshes to 4 meshes, and the filling height of the alumina particles is 350mm to 400 mm;
the fourth layer is 1/2' alumina balls with the filling height of 20mm to 30 mm;
the fifth layer is 3/4' alumina balls with a filling height of 20mm to 30 mm.
In the casting process of the secondary aluminum, the adopted refining method comprises the following steps:
refining gas adopts nitrogen and chlorine;
the refining time is more than or equal to 30 min;
gas flow rate of 8Nm3H to 16Nm3/h。
Or in the casting process of the recycled aluminum, the adopted refining method comprises the following steps:
refining gas adopts argon and chlorine;
the refining time is more than or equal to 30 min;
gas flow rate of 8Nm3H to 16Nm3/h。
Or in the casting process of the recycled aluminum, the adopted refining method comprises the following steps:
refining gas adopts nitrogen or argon;
the refining time is more than or equal to 30 min;
gas flow rate of 8Nm3H to 16Nm3/h。
In addition, the secondary aluminum melting and casting process comprises the following steps:
step S1: controlling each component in the secondary aluminum melt within a preset proportion range;
step S2: controlling the temperature of the secondary aluminum melt within a preset temperature range;
step S3: controlling the liquid hydrogen content of the secondary aluminum melt within a preset hydrogen content range;
step S4: and controlling the slag content of the filtered melt of the secondary aluminum melt within a preset slag content range. Specifically, in the secondary aluminum melt, the components and the preset ratio ranges thereof are respectively as follows:
si in a mass fraction of 0.2 to 0.4%;
0.35 to 0.55 mass percent of Fe;
0.15 to 0.25 mass% of Cu;
0.75 to 0.95 mass% of Mn;
1.1 to 1.6 mass percent of Mg;
ti with the mass fraction of 0 to 0.03 percent;
0 to 0.0005 mass percent of Na;
the mass fraction of other single impurity elements is 0 to 0.05 percent.
Specifically, the upper limit of the proportion of the secondary aluminum in the charging material is not more than 80%.
Specifically, the preset temperature range is 700 ℃ to 780 ℃;
specifically, the preset hydrogen content range is 0 to 0.15ml/100 gAl;
specifically, the preset slag content range is 0-0.03 mm2/kg。
Specifically, the recycled aluminum casting process utilizes recycled aluminum to produce 3104 aluminum alloy tank body materials.
The technical scheme can be seenIn the casting process of the regenerated aluminum, the deep-bed filtration is adopted, and the filling method of the deep-bed filtration medium is innovatively designed, so that the content of the slag in the regenerated aluminum melt can be controlled to meet the production requirement of 3104 aluminum alloy tank body materials, for example, the content of the filtered regenerated aluminum melt slag can be controlled to be not more than 0.03mm2/kg。
In addition, the renewable aluminum casting process utilizes renewable aluminum to produce 3104 aluminum alloy tank body materials, the composition control is stable, and the hydrogen content and slag content of the melt can meet the production requirements of the 3104 aluminum alloy tank body materials. Therefore, the production quality of the 3104 aluminum alloy can body material made of the recycled aluminum is stable and reliable by the recycled aluminum casting process, so that the production cost of the 3104 aluminum alloy can body material is reduced.
Detailed Description
First embodiment
The first embodiment of the invention provides a casting process of secondary aluminum, which mainly comprises the following steps:
secondary aluminum sorting → smelting → pretreatment → smelting → refining → online processing → casting.
In the casting process of the recycled aluminum, deep-bed filtration is adopted, and the filling method of the deep-bed filtration medium is as follows:
the first layer is 3/4' alumina balls with the filling height of 20mm to 30 mm;
the second layer is 1/2' alumina balls with the filling height of 20mm to 30 mm;
the third layer is alumina particles with 3 meshes to 6 meshes, or the third layer is alumina particles with 2 meshes to 4 meshes, or the third layer is mixed and filled with two kinds of particles of alumina particles with 3 meshes to 6 meshes and alumina particles with 2 meshes to 4 meshes, and the filling height of the third layer is 350mm to 400 mm;
the fourth layer is 1/2' alumina balls with the filling height of 20mm to 30 mm;
the fifth layer is 3/4' alumina balls with a filling height of 20mm to 30 mm.
Among them, it should be noted that: 1/2 "means 1/2 inches, i.e., 4 minutes; 3/4 "represents 3/4 inches, i.e., 6 minutes. 25.4 mm 1 inch 8 points.
Further, it should be noted that: 3/4 "alumina spheres" as used herein means alumina spheres having a sphere diameter of 3/4 inches, or alumina sphere particles having a volume similar thereto; 1/2 "alumina spheres" as used herein means alumina spheres having a sphere diameter of 1/2 inches, or alumina sphere particles having a volume similar thereto; the "fill height" may also be referred to as "fill thickness".
It can be seen that the deep-bed filtration is adopted in the casting process of the recycled aluminum provided by the first embodiment of the invention, and the deep-bed filtration medium filling method is innovatively designed, so that the slag content in the recycled aluminum melt can be controlled to meet the production requirement of 3104 aluminum alloy tank body materials, for example, the slag content of the filtered recycled aluminum melt can be controlled to be less than or equal to 0.03mm2/kg。
Further, the refining method adopted in the casting process of the recycled aluminum comprises the following steps: refining gas adopts nitrogen and chlorine; the refining time is more than or equal to 30 min; gas flow rate of 8Nm3H to 16Nm3H is used as the reference value. See the table below for details.
| Refining gases | Time of refining | Flow of gas |
| Nitrogen + chlorine | ≥30min | 8-16Nm3/h |
Further, the above described raw aluminum casting process includes the following steps S1 to S4.
Step S1: controlling the components in the secondary aluminum melt within a preset proportion range.
Specifically, in the casting process, the upper limit of the proportion of the secondary aluminum in the furnace charge is not more than 80%. In addition, in the secondary aluminum melt, the components and the preset ratio range thereof are respectively as follows: si in a mass fraction of 0.2 to 0.4%; 0.35 to 0.55 mass percent of Fe; 0.15 to 0.25 mass% of Cu; 0.75 to 0.95 mass% of Mn; 1.1 to 1.6 mass percent of Mg; ti with the mass fraction of 0 to 0.03 percent; 0 to 0.0005 mass percent of Na; the mass fraction of other single impurity elements is 0 to 0.05 percent. See the table below for details.
Step S2: controlling the temperature of the secondary aluminum melt within a preset temperature range, wherein the preset temperature range is 700-780 ℃.
Step S3: controlling the liquid hydrogen content of the secondary aluminum melt within a preset hydrogen content range, wherein the preset hydrogen content range is 0-0.15 ml/100 gAl.
Step S4: controlling the content of the melt slag after filtering the secondary aluminum melt within a preset slag content range, wherein the preset slag content range is 0-0.03 mm2/kg。
In summary, the casting process of recycled aluminum provided in the first embodiment of the present invention can produce 3104 aluminum alloy can body material by using recycled aluminum, the composition control is stable, and the hydrogen content and slag content of the melt can meet the production requirements of 3104 aluminum alloy can body material. Therefore, the recycled aluminum casting process provided by the first embodiment of the invention can ensure that the quality of the product of the 3104 aluminum alloy can body material made of recycled aluminum is stable and reliable, thereby reducing the production cost of the 3104 aluminum alloy can body material.
Second embodiment
The second embodiment of the invention provides a secondary aluminum melting and casting process which is different from the primary aluminum melting and casting process provided by the first embodiment of the invention only in the refining method adopted. The refining method adopted in the casting process of the secondary aluminum provided by the second specific embodiment of the invention is as follows: refining gas adopts argon and chlorine;the refining time is more than or equal to 30 min; gas flow rate of 8Nm3H to 16Nm3H is used as the reference value. See the table below for details.
| Refining gases | Time of refining | Flow of gas |
| Argon + chlorine | ≥30min | 8-16Nm3/h |
Third embodiment
A third embodiment of the invention provides a secondary aluminum melt casting process that differs from the secondary aluminum melt casting process provided by the first embodiment of the invention only in the refining method employed. The refining method adopted in the casting process of the recycled aluminum provided by the third specific embodiment of the invention is as follows: refining gas adopts nitrogen; the refining time is more than or equal to 30 min; gas flow rate of 8Nm3H to 16Nm3H is used as the reference value. See the table below for details.
| Refining gases | Time of refining | Flow of gas |
| Nitrogen gas | ≥30min | 8-16Nm3/h |
Fourth embodiment
A fourth embodiment of the invention provides a secondary aluminum melt casting process that differs from the secondary aluminum melt casting process provided by the first embodiment of the invention only in the refining method employed. The refining method adopted in the casting process of the recycled aluminum provided by the fourth specific embodiment of the invention is as follows: refining gas adopts argon; the refining time is more than or equal to 30 min; gas flow rate of 8Nm3H to 16Nm3H is used as the reference value. See the table below for details.
| Refining gases | Time of refining | Flow of gas |
| Argon gas | ≥30min | 8-16Nm3/h |
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. The casting process of the recycled aluminum is characterized in that the casting process of the recycled aluminum adopts deep-bed filtration, and the filling method of a deep-bed filtration medium is as follows:
the first layer is 3/4' alumina balls with the filling height of 20mm to 30 mm;
the second layer is 1/2' alumina balls with the filling height of 20mm to 30 mm;
the third layer is alumina particles with 3 meshes to 6 meshes and/or 2 meshes to 4 meshes, and the filling height of the alumina particles is 350mm to 400 mm;
the fourth layer is 1/2' alumina balls with the filling height of 20mm to 30 mm;
the fifth layer is 3/4' alumina balls with a filling height of 20mm to 30 mm.
2. The secondary aluminum melting and casting process as claimed in claim 1, wherein the refining method adopted in the secondary aluminum melting and casting process is as follows:
refining gas adopts nitrogen and chlorine;
the refining time is more than or equal to 30 min;
gas flow rate of 8Nm3H to 16Nm3/h。
3. The secondary aluminum melting and casting process as claimed in claim 1, wherein the refining method adopted in the secondary aluminum melting and casting process is as follows:
refining gas adopts argon and chlorine;
the refining time is more than or equal to 30 min;
gas flow rate of 8Nm3H to 16Nm3/h。
4. The secondary aluminum melting and casting process as claimed in claim 1, wherein the refining method adopted in the secondary aluminum melting and casting process is as follows:
refining gas adopts nitrogen or argon;
the refining time is more than or equal to 30 min;
gas flow rate of 8Nm3H to 16Nm3/h。
5. The secondary aluminum melt casting process as claimed in claim 1, wherein the secondary aluminum melt casting process comprises the steps of:
step S1: controlling each component in the secondary aluminum melt within a preset proportion range;
step S2: controlling the temperature of the secondary aluminum melt within a preset temperature range;
step S3: controlling the liquid hydrogen content of the secondary aluminum melt within a preset hydrogen content range;
step S4: and controlling the slag content of the filtered melt of the secondary aluminum melt within a preset slag content range.
6. A secondary aluminum fusion casting process according to claim 5, wherein the secondary aluminum melt comprises the following components in preset ratio ranges:
si in a mass fraction of 0.2 to 0.4%;
0.35 to 0.55 mass percent of Fe;
0.15 to 0.25 mass% of Cu;
0.75 to 0.95 mass% of Mn;
1.1 to 1.6 mass percent of Mg;
ti with the mass fraction of 0 to 0.03 percent;
0 to 0.0005 mass percent of Na;
the mass fraction of other single impurity elements is 0 to 0.05 percent.
7. The secondary aluminum melting and casting process as set forth in claim 6, wherein the secondary aluminum accounts for not more than 80% of the upper limit of the proportion of the charge.
8. A secondary aluminum fusion casting process according to claim 5, characterized in that the preset temperature range is 700 ℃ to 780 ℃;
and/or the preset hydrogen content range is 0-0.15 ml/100 gAl;
and/or the preset slag content range is 0-0.03 mm2/kg。
9. A secondary aluminum casting process according to any of claims 1 to 8, characterized in that the secondary aluminum casting process utilizes secondary aluminum to produce 3104 aluminum alloy can stock.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010325726.8A CN111424182A (en) | 2020-04-23 | 2020-04-23 | Casting process for secondary aluminum |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010325726.8A CN111424182A (en) | 2020-04-23 | 2020-04-23 | Casting process for secondary aluminum |
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| CN111424182A true CN111424182A (en) | 2020-07-17 |
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| CN202010325726.8A Pending CN111424182A (en) | 2020-04-23 | 2020-04-23 | Casting process for secondary aluminum |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1238863A (en) * | 1984-06-01 | 1988-07-05 | Michael C. Bennett | Deep bed filter |
| DE10055523C1 (en) * | 2000-11-09 | 2002-04-18 | Vaw Ver Aluminium Werke Ag | Unit for filtration of, and finings addition to molten metal, includes filter, fining material addition station and second filter |
| CN106917016A (en) * | 2017-03-06 | 2017-07-04 | 桂林航天工业学院 | Car body lightweight aluminum alloy plate materials and preparation method thereof |
| CN108486436A (en) * | 2018-06-12 | 2018-09-04 | 中铝东南材料院（福建）科技有限公司 | A kind of high-performance aluminium alloy band and preparation method thereof |
| CN110983083A (en) * | 2019-12-26 | 2020-04-10 | 乳源瑶族自治县东阳光高纯新材料有限公司 | Production process of cast ingot for cathode aluminum foil |
-
2020
- 2020-04-23 CN CN202010325726.8A patent/CN111424182A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1238863A (en) * | 1984-06-01 | 1988-07-05 | Michael C. Bennett | Deep bed filter |
| DE10055523C1 (en) * | 2000-11-09 | 2002-04-18 | Vaw Ver Aluminium Werke Ag | Unit for filtration of, and finings addition to molten metal, includes filter, fining material addition station and second filter |
| CN106917016A (en) * | 2017-03-06 | 2017-07-04 | 桂林航天工业学院 | Car body lightweight aluminum alloy plate materials and preparation method thereof |
| CN108486436A (en) * | 2018-06-12 | 2018-09-04 | 中铝东南材料院（福建）科技有限公司 | A kind of high-performance aluminium alloy band and preparation method thereof |
| CN110983083A (en) * | 2019-12-26 | 2020-04-10 | 乳源瑶族自治县东阳光高纯新材料有限公司 | Production process of cast ingot for cathode aluminum foil |
Non-Patent Citations (3)
| Title |
|---|
| 刘胤翔: "《7A52铝合金熔铸工艺要素控制》", 《世界有色金属》 * |
| 张深根等编: "《典型废旧金属循环利用技术》", 28 February 2017, 冶金工业出版社 * |
| 张磊等: "《深床过滤在连续铸轧生产过程中的应用》", 《有色金属加工》 * |
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Application publication date: 20200717 |